Alarm-clock



W. D. DAVIES.

Model.)

ALARM CLOCK.

No. 315,603. Patented Apr. 14, 1885.

E ammmm iii/k 2.9.9- 0.9

n PU'EHS Pnolmlllnopzphev wmm mu c UNITED STATES PATENT OFFICE.

\VALTER D. DAVIES, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE ANSO- NIA CLOCK COlifPANY, OF ANSONIA, CONNECTICUT.

ALARM-CLOCK.

SPECIFICATION forming part of Letters Patent No. 315,603, dated April l4 1885,

Application filed November B, 1581. (K0 mozlcl.)

To all whom it may concern:

Be it known that I, \VALTER D. Diivnss, of the city of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Alarm-Clocks, of which the following is a specification.

My invention relates, principally.to alarmclooks which have the alarm-bell and alarmmovement arranged upon the exterior of the case, as is shown and described in my application for Letters Patent, Serial No. 120,002, filed February 7,1884, the alarm-movement being arranged within the bell and the alarmhammer being arranged to operate in a hori' zontal plane upon the inner side of the bell. In clocks of this class the tripping mechanism for releasing the alarm-hammer at a. desired predetermined time is arranged within the case, and in the cloclz which forms the subject of my above-mentioned application theirip-lever was extended through the top of the case and engaged the hammer.

The cases of clocks of this kind are com mouly cylindric or polygonal in shape, and the entire movement is inserted at the back of the case as one piece. In my aforesaid applicaticn thctripdever, as it had to be lon enough to project from the case, interfere somewhat with the direct insertion of the movement into the case; and one object of my invention is to avoid this difiiculty, and to so construct and combine the trip-leverand alarm-hammer that the trip-lever will not project through not, therefore, interfere with the direct inscrtion of the movement into the case. To this end I provide the hammer with a downward projection which'extends through a. slot in the case into engfiement with the trip-lever, so as to be block or held against movement by said lever until the trip releases it.

Another object of-the invention isto reduce the size of the alarm-bell without at the same time reducing thesize of the olefin-movement or its spring. To this and 1 construct the top or upper plate of the alarm-movement with an upwnrdl extending and central hub or projection, orming within it and on the una'nd beyond the case, and will der side of said plate a circular-cavity wherein the alnrm-spring is contained.

The plates which form part of the frame for the alarm-movement arenccessarily of greater diameter than the spring, and the arrangement of the spring in ncavity, as described, enables the spring to occupy a. position higher up in the bellthnn would be possible if the upper plate were ilat with the spring below it, and to that extent reduces the size of the bell necessary to contain the alarm-movement.

Another feature of the inventiomwhich is not restricted to alarm-clocks having the bell and alarm movcmcntextcrnal to the case, relates to clocks wherein the alarnriudcx is con centric with the main arbor, and which are termed central-setting alarms.

Insuch clocks as heretofore constructed the glass at the front of the dial (if a. glass is used) is set in a sash, which must be opened when it is desired to set the alarm. This movable sash adds to the cost of the clock; and another object of the invention is to enablcu fixed glass to be used and still have the central alarm-setting.

To this end the invention also consists in a novel combination of parts, hereinafter described, whereby the central setting of the alarm may be accomplished by a. spindle extending through the side of the case.

The invention also consists in other combinations of parts, hereinafter described, and pointed out in the claims.

In tbeaccompanyingdrnwings,Fignre 1 rep resents a partly sectional side elevation of a clock embodying my invention. Fig. 2 is a. front elevation thereof with a portion of the alarn1-bell and the adjacent portion of the case broken away or removed. Fig. 3 is a plan view representing the front plate of the frame of the movement and the gearing whereby the central setting of the alarm is accomplished; and Fi 4= is a sectional view in a. plane parallel V th the main arbor, illustmting a. part of the alarm-setting devices and a portion of the dial with their adjacent parts.

In all of the figures similar letters of reference designate corresponding parts.

A designates the case, which is shown as circular, and B designates the back of the case, which is removable therefrom with the movement.

The ti|ne-niove1ncnt forms no part of my invention, and I have, therefore, only shown such parts thereof as are necessary to a clear front of the case' A,aud behind which is a bezel or ring, b, against which bears the dial F, whereby all said parts are held in place.

G designates the hounwhecl, having the usual sleeve or pi pe,G',projecting from it,and carrying at its outer end the hour-hand g.

H H designate, respectively, the lower and upper plates, which, with their connectingposts 0, constitute the frame of the alarmmovement. The lower plnte,H,is constructed with arms h, which are cut or stamped from it and deflected or bent downward, as shown in Fig. 2, so as to straddle and rest upon the top of the case. These arms h are secured by screws 11* or other means to the case. The upper plate, H, of the movement has an up ward central hub or projection,forining on the under side thereof a circular cavity, h, in which is arranged the alarm-spring c. This spring has one end, 42*, fast in the plate H, and by its other end acts upon the main or windin arbor f of the alarm. The main wheel of the alarm-movement drives into a pinion, e, and on the same arbor with the pinion is an escape-wheel, e, which operates the escapepallct e on the hammer e, the hammer being pivoted at a.

In or to the top plate, H, isrigidly secured a post or stem, f, which is shouldered at f*, and on which is supported the alarm-bell I. The bell is held in place by the nut f, in which the suspension-ring f is secured, and which is screwed upon the stem f. The windin arbor f extends through the post or stem f which is hollow, and has at the top a button or head, f whereby it may be turned. The extent of the upper plat H, is necessarily greater than the size of e spring, and it is obvious that by arranging the spring in a cavity, it, formed by an upward projection on the plate I arrange the spring higher up in the helll than would be possible if the spring were on the under side of a fiat plate. Consequently, the distance between the plates H H at the posts 0 is less than it otherwise would be, and the size or height of the bell necessary to contain within it and conceal the whole alarm-movement is reduced.

It will he observed that the hammer o is arranged to work in a horizontal plane, and has a downward projection oral-m, 6", which extends through and plays in slots ha in the lower frame-plate, H, and case A, for a. pun pose hereinafter described.

I will now describe the alarm tripping and setting mechanism. On the outer face of the hour-wheel G is a hub having a tooth or projcction, i, which constitutes the tripping-cum; and J desi natcs the alarm-cam, which is notched at to receive the tooth or projection i when thclntter is brought opposite the notch by the rotation of the hem-wheel G.

The alarm-cam J is constructed with asleevc or pipe, j, which extends through a. central opening in the dial-plate F, as best shown in Fig. 4-.

0n the slecvcor pipe j, inside of and against the dial, is secured firmly acontrateor crown wheel, K, and on the said sleeve or pipe outside the dial is a washer, is, and the alarm index or hand I, the end of the pipe or slceve j being riveted or turned outward to hold all in place.

As shown best in Fig. 1, the central portion of the wheel K is coucaved or set back in a direction away from the-dial, and its elasticity serves to hold the alarm-cam against accidental turning, the outer portion of the wheel having frictional contact with the inner face of the dial-plate F.

On the front of the plateC of the movement is secured a bracket, m, as shown in Fig. 3, in which is journaled a setting spindle or arbor, m, on which is a pinion, 1n, gearing into the contrate-wheel K. The spindle or arbor m projects through the sideof the case, as shown in Fig. 2, and is provided outside the case with a head thumbpiece, m, whereby it may he turned to turn the alarm-cam J and index or hand I, to release the alarm mechanism at any predetermined hour.

Behind the hour-wheel G is the trip-lever L, which is secured to the plate 0, and which has elasticity to cause it to spring outward from said plate. The trip-lever when the alarm is set is obtruded in the way of the projection c* on the hammer e, as shown in Fig. 1, and so holds the hammer against operation. The trip-lever is held in this position by the cam-projection 1', bearing on the face of the alarm-cam J but when the tooth or projection i reachesthenotch* the trip-leverL is allowed to spring forward, carrying its upper end out of the way of the projection e on the ham- Iner and allowing the alarm to operate.

It will be observed that the end of the triplever L does not extend quite tothe cylindric case A, and hence it does not in any way interfere with slipping the movement-into place from the back of the case.

WhatI claim as my invention, and desire to secure by Letters Patent, is-

1. The combination, with a. clock-case and an alarm-bell upon the exterior thereof, of an alarm-movemcntarrauged within the bell and comprising a hammer arranged to operate in a horizontal plane, and havingau arm or projection extending downward through a slot in l the case into the interior thereof, and a trip- I lever serving to block the alarm-hammer by engaging with the downward projection thereon, substantially as herein described.

2. The combination, with a cloel;case and an alarm-bell on the exterior thereof, of an alarnrinovement and a frame therefor, all arranged within the bell, one plate of the alarmlnovement having a cavity formed in a hub or projection from its upper side and containing therein the spring of the alarm-move]nent, substantially as herein described.

3. The combination, with the diatplatc F, having a central aperture, of the alarm-cam J, having a sleeve,j extending through the dial-plate, the illZlIllbilldCX on said sleeve, oub

side the dial-plate, the contrate-wheel K, fast on said sleeve inside the dial-plate, and the arbor and pinion m 7H2 forturning said contratewheel and alarm-cam, substantially as herein described.

4'. The conibination,\vith the cl0ck-case A. and the hell I, of an alarm-movement contained within the bell, and comprising the plate II, having arms h,which extend downward and outward in opposite directions and are attached to the ease, substantially as herein described.

\YAIJIER D. DAVIES.

\Vitnesses:

Fimnic. llflt vxias, EnIL Seinviurrz. 

